The Drifter (1944)

Billy Carson discovers that "Drifter" Davis, an exact double, has been impersonating him in order to cover up a series of bank robberies. When the sheriff jails Davis, believing him to be Carson, Billy sees the chance to turn the tables and clear his name. He impersonates Davis and takes his place as a sharpshooter with the Sally Dawson Medicine Show that is traveling though the area. Just about the time that Billy gets a lead that ties up Dirk Trent, the show's publicity man, with the bank robberies, Billy's pal, Fuzzy Jones, causes complications by helping Davis escape from jail, thinking he is the real Billy Carson.